Show:
Regrouping
Across One Zero
Across 2 Zeros
100
What is 920 - 50?
870
100
What is 507 - 294?
213
100
What is 100 - 21?
79
200
What is 837 - 47?
790
200
What is 309 - 144?
165
200
What is 200 - 122?
78
300
What is 680 - 215?
465
300
What is 908 - 199?
709
300
What is 400 - 153?
247
400
What is 483 - 294?
189
400
What is 906 - 247?
659
400
What is 600 - 296?
304
500
What is 713 - 284?
429
500
What is 803- 315?
488
500
What is 800 - 647?
153